Bracket for stair-treads



w. E. IRVING. BRACKET FOR STAIR TREADS.

APPLICATION FILEDJUNEZ-j.H418v Patented May 20, 1919.

2 SHEETS-SHEET I W E IRVING BRACKET FOR STAIR T'READS.

- APPLICATION. FILED was 25. 1918- 1,304,056.

Patented May 20, 1919.

2 SHEETS-SHEET 2- I I 'rwenlio l 5B9 hi0 @HIOZTIW UNITED STATES PATENTorricn.

WALTER EDWARD IRVING, OF GLENBBOOK, CONNECTICUT.

BRACKET FOR STAIR-TREADS.

Application filed June 25, 1918. Serial No. 241,761.

veniently supporting the ends of iron gratings such as are used formaking stair treads in ships and other structures. Such stair treadshave heretofore generally been made of ordinary rods, which have beeninserted in holes in the staircase side members and upset or otherwisefastened therein, but now more highly organized forms of gratings arebeing used for such stair treads and the question of how best to supportthese small panels of grating structure from the side members of thestaircase is a more diflicult one. I have invented a simple form ofintegral bracket which can be cheaply made without special tools, bentand punched cold, and which forms a most effective support and fasteningmeans for the grating ends. The

best form of apparatus at present known tome embodying my invention isillustrated in the accompanying sheet of drawings in which- Figure 1 isa perspective view of the bracket and one end of a stair tread grating,

supported thereby, parts being broken away.

Fig. 2 is a vertical section on line 22 of Fig. 1, showing two of thebrackets in position on a staircase side support. A

Fig. 3 is a detail cross section showing a modified formof bracket.

Fig. 4: is a view similar to Fig. 1, showing the modifiedconstruction'also illustrated in The bracket has end ears 5, 5, bent atright' angles to body 4:, and spaced to embrace the ends of the .outermembers 1, 1, of the grat- Specification of Letters Patent. Patented May20, 1919.

ing. Bracket ears and grating members have holes punched in them whichregister one with another so that the parts may be fastened together byrivets 6, 6. Lugs 7, 7, are formed on, the inner surface= of the bracketby stamping out and bending in tongues of the body metal, which @lugs ortongues come under the ends of certain of the inner straight supportingmembers 1, 1, of the grating. The holes 8, 8, left by bending out thematerial to form the lugs conduce to ease in cleaning the parts of thecompleted stairway and avoiding the collection of dirt in the cornersbetween lugs, bracket bodies, and grating bars, the side member 3 of thestaircase having registering open-' figs 12, 12, punched therein, asindicated in Preferably these lugs are punched out in grooved or curvedform as shown so that the grooves or concavities so formed on theirupper surfaces will embrace and engage the under edges .of bars 1, 1,thus insuring the continued centering of the member 1, on the lugs evenunder application of great weights wlliich might tend to bend the barsto one s1 e.

The rivet holes 6, 6, in end ears 5, 5, regis ter with the holes punchedin bars or bearing members 1, to receive rivets 11, 11, which areemployed to fasten the bent strips 2, 2, to the bearing members, so thatno special punch work is required for this connection.

A modified form of grating supporting lug having many advantages shownin de-- tail in Fig. 3. The punch which forms the opening 8, and stampsout lug 17, is given a special construction so that said lug is groovedor slotted at its upper end, as shown at 10,.and is bent through anangle of only about 45 degrees so as to leave it standing in theinclined position shown in Fig. 3. The bearing members 1, of the gratingare then seated in grooves or slots 10. This gives a positive,interlocking joint between grating sizes of grating panels, and thesecan be used in the making of any type of iron stairway or ladder.

Having described my invention, I claim: 1. As a new article ofmanufacture an inw tegral bracket for supporting stair tread gratingsand the like, comprising a strip of metal perforated for reception ofmeans to attach it to a proper support, having perforated cars at eitherend bent at right angles to the body of the bracket, and supporting lugsformed of tongues of metal stamped out of the body of the bracket andprojecting from the same side thereof as do th above mentioned ears.

2. A structure such as set forth in claim 1 in which the lugs aregrooved so as to present a concave upper bearing surface.

3. The combination with a grating having a series of horiaontallyextending members, the outer ones being horizontally perforated neartheir ends, of a bracket for supporting said grating, comprising a stripof metal having at each end ears projecting at right angles to thebracket body, spaced to embrace the ends of the outer grating members,

and perforated to register with the perforations in said members, andalso having lugs punched out of the bracket body and extending under andin contact with the ends of other horizontally extending members of thegrating.

4. A combination such as set forth in claim 3 in Which the lugs aregrooved to partly surround the grating members with which they engage.

5. Asv a new article of manufacture a bracket for supporting the end ofa grating or similar structure which bracket comprises a strip of metaladapted to be fastened to a supporting structure and having a lugstamped out and projecting inwardly toward the grating in an inclinedposition, said lug having a relatively deep and narrow groove in itsupper surface.

WVALTER EDWARD IRVING.

